Commitments And Contingencies (Schedule of Delivery Commitments) (Details)	Dec. 31, 2019 mMBtus_per_day
Commitments and Contingencies Disclosure [Abstract]
2020	196,557
2021	175,000
2022	175,000
2023	175,000
2024	150,137
Thereafter	156,164
Total gas delivery commitments	1,027,858